A 6-year-old boy in Mississippi who was supposed to graduate from kindergarten on Thursday was found shot to death in the backseat of his mother’s car — after it was stolen from a grocery store with him inside, cops said.

Little Kingston Frazier, of Jackson, had been sitting in the back of his mom’s idling Toyota Camry by himself, waiting on her to finish shopping at a Kroger on I-55, when two suspects pulled up and swiped the vehicle early Thursday morning, according to the Clarion-Ledger.

The pair had been in a Honda Civic Coupe and were caught on surveillance tape driving around the store’s parking lot before taking the car, cops said.

After pulling up next to the Camry, the passenger reportedly jumped into the driver’s seat and took off — speeding away, along with his accomplice.

An Amber Alert was eventually issued and local cops canvassed the area for several hours before finding the stolen car in Gluckstadt at around 10 a.m., the Clarion-Ledger reports.

Authorities said officers discovered Frazier in the backseat with a single gunshot wound. The car was 15 miles away from the Kroger where his mom, Ebony Archie, had been shopping.

At least three suspects have been arrested in connection to the coldblooded killing, including the two men who allegedly stole the Camry. The third person of interest is believed to be an accomplice.

Dwan Diondro Wakefield and DeAllen Washington, both 18, were taken into custody at around 11:30 a.m. and 2:45 p.m., respectively. A third person — identified as Byron McBride, Jr — was apprehended at around 4 p.m., the Clarion-Ledger reports.

It’s unclear, though, exactly who took the car with Frazier. None of the the three men have been charged, and authorities have not released a motive.

Family and friends were caught on video collapsing and sobbing uncontrollably after learning about Frazier’s death from police.

“Why, God, why?!” a person can be heard screaming.

“Oh God, my baby! My baby!”

Frazier’s father, at one point, can be seen yelling at the cops with no shirt on. Loved ones attempted to calm him down and were eventually able to pull him away.

Relatives told local media that Frazier was supposed to graduate from kindergarten on Thursday.

Family and friends described the youngster as “outgoing” and a joy to be around on Thursday afternoon — while also condemning the suspects for their alleged actions.

“Just a great, great, 6-year-old who we just can’t imagine that something like this would happen, that people would have in their heart to do that to a 6-year-old,” Frazier’s uncle, David Archie, told the Clarion-Ledger.

“Even if I was mad at the world, I couldn’t do this to a 6-year-old,” he said. “To me, it’s hatred. There is nothing out there worth taking a 6-year-old’s life…I can tell you this, we won’t rest until they’re brought to justice…You can believe that.”

D’Allen Tyreek Washington andReuters

The boy’s great aunt, Velma Eddington, said his death was ultimately proof that “evil” existed everywhere.

“Everyone that was praying for us, that we would find Kingston alive, we want to thank everybody for that, but this is, really, this is, it’s hard to know that people out there are evil, that would kill a child,” she said. “That’s evil. That baby hadn’t done anything to him. That baby hadn’t done nothing. They could have left that child on that backseat, asleep. They didn’t have to kill him. Those people are evil. Evil. They need to find that other one before we find him…it’s evil what they did.”